The synchronous motor of Problem 5.7 is supplied from a 575-V source through a feeder with a reactive impedance of Xf = 0.95 2. The motor is operating at rated speed and source voltage and at an output power of 40 kW. Ignoring losses in the motor, calculate the magnitude and phase angle of the line-to-neutral generated voltage af, the field current If and the line-to-line motor terminal voltage V₁ if the motor is operating at (a) 0.9 power factor lagging, (b) unity power factor, and (c) 0.9 power factor leading as measured at the 575-V source.
The synchronous motor of Problem 5.7 is supplied from a 575-V source through a feeder with a reactive impedance of Xf = 0.95 2. The motor is operating at rated speed and source voltage and at an output power of 40 kW. Ignoring losses in the motor, calculate the magnitude and phase angle of the line-to-neutral generated voltage af, the field current If and the line-to-line motor terminal voltage V₁ if the motor is operating at (a) 0.9 power factor lagging, (b) unity power factor, and (c) 0.9 power factor leading as measured at the 575-V source.
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Transcribed Image Text:The synchronous motor of Problem 5.7 is supplied from a 575-V source
through a feeder with a reactive impedance of Xf = 0.95 $2. The motor is
operating at rated speed and source voltage and at an output power of 40 kW.
Ignoring losses in the motor, calculate the magnitude and phase angle of the
line-to-neutral generated voltage af, the field current If and the line-to-line
motor terminal voltage V₁ if the motor is operating at (a) 0.9 power factor
lagging, (b) unity power factor, and (c) 0.9 power factor leading as measured
at the 575-V source.
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